Improvement in piston-packing



@uitrit tetesatrntffirr.

THOMAS B'ISBEE, OFADAYTON, OHIO, ASSIGNOR TO HIMSELF AND EDWINR.'STILWELL',: OF SAME PLACE.

A.Lettera Patent No. 76,295, rlted April T, 1868.

@Elie ,Soehnle referat trim tins: tttersamt mit making part tf tip'same.

T0 -ALL WIJIOM IT MAY GONCERN:

Be it known that L'THOMAS A. BISBEE,`ofDayton,county of Montgomery, and-State of Ohio, have invented a new vand improved Steam Pistou-Packingfor Steam-Engines; and I do hereby declare the following to bea full,clear, and exact description thereof, reference being had to theaccompanying drawings, making partrof this specification, in which-Figure l is an edge view of the head, with the ringY and plugin'position.

Figure 2 is a longitudinal section/through the same, taken at thepoint.'

Figure 3 is auedge view of the head, with ring andplug removed.

Figure 4 is a. vertical view of the plug. v

Figure 5 is a face view of the plug. n

Figure 6 is a horizontal view of ring, with the plug attached; andvFigure 7 an edge view of the same. l

This invention relates to a novel arrangement4 for breaking tliejoint inthe ring employed in packing the piston in steam-engines. v

The object of my invention is to furnish a self-adjusting plug, so thatitV moves freelywith the ring in 'its lateral movements, andat the sametime adjusts itselfito and perfectly breaks the joint of the ring. Thering is formed of one piece of metalio'nl-y, andeccentric4 in itsshape.l The ring is made eccentric in form, as shown in the drawing, forthepurploselpof-makinghe expansion equal at all points of the circle. V

To enable others skilled in the art to understand my invention, I willdescribe its construction andoperation.,

In the accompanying 4drawing, iig-..1 represen'ts'a solidhead, withthering and plug in position. a a,g. 2, show the space allowed frtheplay either-ing. Ao, fig. 2, shows-space allowed for the play of theplug. c?, fig. 1, shows the ring cut and the jointibrokenby the plug Theplug E may be made elliptical between the points a a. The ring ismadento t 'clos'elyfin the groove b, 15g. 4.

Operation: Steam enters the head by mean/s of small openings at e e e,forces thc ring and plug to their bearing .against Vthe opposite face orslidulder, and at the same time expands the ring, and forces it and theplug to abearing against the cylinder. .4 Thje action is repeated asthe'steam isadmitted alternately at either end of4 the cylinder. i -f IWhat I claim as new, and desire to secure by Letters Patent, is

1. The cylindrical plug E, substantially as and for tlie purposesdescribed.

2. I claim th'e combination of theplug E and eccentric-ring A,substantially as described.

' THOS. A. BISBEE. Witnesses:

' G. NELSON Braxton,

E. R. STILWELL.l

